NTC was invited by Datelco AS to help design, deliver and install a new data center for NEP on Økern. The tender process from NEP’s side was managed by Technical Director Eirik Nakken, Project Manager Morten Johansen and IT & Network engineer Jakob Larsson, from Datelco Managing Director Tom Johnsen and project manager Lars Løvås, from NTC Managing Director Jarle Grytli and consultant Erik Vennemoe.With extensive expertise at NEP, the solution choices for the final design were relatively simple.
The result of the negotiations was a modular computer room of 195m2 with SmartShelter panels consisting of steel plates with fire-retardant paint and the core between the steel plates filled with compressed mineral wool. This solution protects against fire and water penetration. With a ceiling height of over 4 metres, it was chosen to lay a computer floor with a height of 60 cm. This provides ample space for air flow that goes from the room’s Uniflair CRACs, under the floor and up to the enclosed cold zone. This design results in major savings on energy consumption. Some of the same could be achieved with InRow coolers, but it would “steal” too many rack spaces compared to actual need. A separate central vacuum cleaner system has been installed in the computer room for the easiest possible cleaning, as well as excess pressure from the building’s ventilation system to prevent the ingress of dust and particles from the neighboring area, which is a garage.
The entire cooling solution has a 2N design, with redundant A and B Uniflair ice water chillers w/free cooling on the roof, which supply ice water through stainless steel piping to A and B Uniflair CRACs in the computer room and A and B CRACs in the A and B UPS room, respectively. The entire plumbing contract was carried out by ORAS Sandvika. We have used a Jote control system between the A and B side of the cooling system, which takes effect with the closing of valves etc. in the event of a critical incident in either the A or B circuit. In this way, it is ensured that the circuit where the problem has arisen is closed and the entire load transferred to an alternative circuit. All signaling is SNMP based, if devices deliver Modbus signals, these are converted via SNMP which communicates with the customer’s exchange.
The selected UPS solution is Eaton’s scalable 93PM UPSs in 250kVA design, which can later be upgraded in 50kVA increments up to 400kVA per unit. We have installed BACS battery management so that we can detect any problems with battery cells at an early stage and, not least, ensure the longest possible lifetime of the battery banks by means of optimized charging voltage at all times.
There is room for 90 racks in the room, Panduit solutions with 60cm width, 120cm depth and 48U height were used. This combined with a network rack of the same type, but with a width of 80 cm. All racks have a full front door and a split rear door. Each of these is equipped with APC metered power rails/PDUs in A and B designs. The supply to these comes from a Canalis busbar system 400V with tap-off boxes in either 16Amp 400V or 16Amp 230V.
Furthermore, Satema has supplied diesel generators, control systems for this, ATS for connection between city electricity and generators, as well as switchboards. All electrical work is carried out by Datelco AS. All lighting is LED based to reduce power consumption and heat generation.
Fire extinguishing with early warning is provided by a Novec system supplied by Brannslokkesystemer AS.
Construction started on 1 June and the facility was completed in mid-September. Full-scale test on 17 September and final handover on Wednesday 18 October. Project managers from our side were Lars Løvaas from Datelco and Jarle Grytli from NTC. We can help with reference visits for customers who are interested in more information and, not least, to see the plant in operation.
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